added tests

Author: lucaferranti

test/display_tests/display.jl

@@ -177,6 +177,26 @@ setprecision(Interval, Float64)
         setformat(:full)
         @test string(X) == "IntervalBox(Interval(-Inf, Inf), 2)"
 
+
+        setformat(:standard)
+        a = IntervalBox(1..2, 2..3)
+        @test string(a) == "[1, 2] × [2, 3]"
+
+        b = IntervalBox(emptyinterval(), 2)
+        @test string(b) == "∅²"
+
+        c = IntervalBox(1..2, 1)
+        @test string(c) == "[1, 2]¹"
+
+        setformat(:full)
+        @test string(a) == "IntervalBox(Interval(1.0, 2.0), Interval(2.0, 3.0))"
+        @test string(b) == "IntervalBox(∅, 2)"
+        @test string(c) == "IntervalBox(Interval(1.0, 2.0), 1)"
+
+        setformat(:midpoint)
+        @test string(a) == "(1.5 ± 0.5) × (2.5 ± 0.5)"
+        @test string(b) == "∅²"
+        @test string(c) == "(1.5 ± 0.5)¹"
     end
 end
 
@@ -203,6 +223,14 @@ end
     setformat(decorations=true)
     @test string(x) == "[0, 1]₁₂₈_def"
 
+    a = IntervalBox(1..2, 2..3)
+    b = IntervalBox(emptyinterval(), 2)
+    c = IntervalBox(1..2, 1)
+
+    @test sprint(showfull, a) == "IntervalBox(Interval(1.0, 2.0), Interval(2.0, 3.0))"
+    @test sprint(showfull, b) == "IntervalBox(∅, 2)"
+    @test sprint(showfull, c) == "IntervalBox(Interval(1.0, 2.0), 1)"
+
 end
 
 @testset "@format tests" begin